US5880865A - Wavelength-division-multiplexed network having broadcast capability - Google Patents

Wavelength-division-multiplexed network having broadcast capability Download PDF

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US5880865A
US5880865A US08759743 US75974396A US5880865A US 5880865 A US5880865 A US 5880865A US 08759743 US08759743 US 08759743 US 75974396 A US75974396 A US 75974396A US 5880865 A US5880865 A US 5880865A
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optical
signal
λ
broadcast
wavelength
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US08759743
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Xiaolin Lu
Sheryl Leigh Woodward
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Lucent Technologies Inc
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Lucent Technologies Inc
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04HBROADCAST COMMUNICATION
    • H04H20/00Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/65Arrangements characterised by transmission systems for broadcast
    • H04H20/69Optical systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J14/00Optical multiplex systems
    • H04J14/02Wavelength-division multiplex systems
    • H04J14/0227Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J14/00Optical multiplex systems
    • H04J14/02Wavelength-division multiplex systems
    • H04J14/0227Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0228Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths
    • H04J14/023Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths in WDM passive optical networks [WDM-PON]
    • H04J14/0232Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths in WDM passive optical networks [WDM-PON] for downstream transmission
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J14/00Optical multiplex systems
    • H04J14/02Wavelength-division multiplex systems
    • H04J14/0227Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0241Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
    • H04J14/0242Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
    • H04J14/0245Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for downstream transmission, e.g. optical line terminal [OLT] to ONU
    • H04J14/0246Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for downstream transmission, e.g. optical line terminal [OLT] to ONU using one wavelength per ONU
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J14/00Optical multiplex systems
    • H04J14/02Wavelength-division multiplex systems
    • H04J14/0227Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0241Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
    • H04J14/0242Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
    • H04J14/0249Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU
    • H04J14/025Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU using one wavelength per ONU, e.g. for transmissions from-ONU-to-OLT or from-ONU-to-ONU
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J14/00Optical multiplex systems
    • H04J14/02Wavelength-division multiplex systems
    • H04J14/0278WDM optical network architectures
    • H04J14/0282WDM tree architectures
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/22Adaptations for optical transmission
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J14/00Optical multiplex systems
    • H04J14/02Wavelength-division multiplex systems
    • H04J14/0226Fixed carrier allocation, e.g. according to service

Abstract

A Wavelength-Division-Multiplexed (WDM) network provides delivery of both switched services and broadcast analog video over optical facilities through an intermediate optical apparatus (e.g., Passive Optical Network (PON)) splitter to a plurality of remote optical apparatuses (e.g., optical-network units (ONUs)). The broadcast signal is provided to only a selected ONU, together with the switched service signal for that selected ONU, the selected ONU then distributes the broadcast signal to other ONUs over a separate distribution facility interconnecting the ONUs.

Description

TECHNICAL FIELD OF THE INVENTION

This invention relates to wavelength-division-multiplexed networks and, more particularly, to a wavelength-division-multiplexed network having broadcast capability.

BACKGROUND OF THE INVENTION

It is expensive to provide analog broadcast TV over a passive-optical network (PON) because of the high carrier-to-noise ratio (CNR) required of these signals(˜50 dB/4 MHz). To achieve this high CNR performance, very linear transmitters must be used, and the transmission power level should be such to ensure that enough signal power (i.e. 0.2 mW) reaches the optical receiver. Since the output power of transmitters is limited, a single transmitter can only serve a limited number of receivers (unless expensive optical amplifiers are used). Because the optical receiver is not shared by many users in a fiber-to-the-home (FTTH) or fiber-to-the-curb (FTTC) systems, the cost of the transmitter will not be shared among many users. It therefore is quite expensive to provide broadcast analog video over a PON.

This problem is present in both wavelength-division-multiplexed PONs (where the light's wavelength determines which ONU receives the signal) and power-splitting PONs (where the light is split at a power-splitter, and all the ONU's receive the same signals).

One illustrative switched digital video system which broadcasts analog video signals is described in the article entitled "Video Services Delivery in Fiber in the Loop Systems Using MPEG Encoding and ATM Transport" by J. R. Jones, published in IEEE Lasers and Electro-Optics Society 1993 Annual Meeting, Nov. 15-18, 1993. This system is basically a hybrid-fiber-coax (HFC) system combined with a FTTC-PON. The broadcast signal is sent to a fiber-node, which then transmits the broadcast signals over coaxial cable serving many users (hundreds). The PON provides switched services to each ONU. The coaxial cable provides the ONU with power, and from the ONU the switched signals and the broadcast signals are transmitted to the home.

Undesirably, the prior art has not fully integrated the two systems (HFC and PON). Transmitting the broadcast signals to the neighborhood over a PON should lower the cost of deployment, operations and maintenance.

SUMMARY OF THE INVENTION

The present invention solves the problem of providing cost effective delivery of both switched services and broadcast analog video over a Wavelength-Division-Multiplexed (WDM) network through an intermediate optical apparatus (e.g., the splitter of a Passive Optical Network (PON)) to a plurality of remote optical apparatuses (e.g., optical-network units (ONUs)). In accordance with the present invention, the problem is solved by interconnecting the ONUs, using a separate distribution facility, and sending the broadcast signal to only one selected ONU. This selected ONU then relays the broadcast signals to the other ONUs over the distribution facility.

According to one aspect of the invention, the WDM network includes a power-splitting PON and the wavelength of the optical broadcast signal is transmitted at a different wavelength than the wavelengths of the optical switched services' signals used by the ONUs, so that only the selected ONU receives the optical broadcast signal. In another arrangement the PON is a WDM PON and the splitter is a Dragone router. According to another aspect, the optical broadcast signal is transmitted to the selected ONU by modulating a Radio Frequency (RF) sub-carrier of the optical wavelength used to send the optical switched services signal to the selected ONU.

BRIEF DESCRIPTION OF THE DRAWING

In the drawings,

FIG. 1 shows a simplified illustrative switched services and broadcast analog video distribution system in accordance with the teachings of the previously-referenced Jones article,

FIG. 2 shows a simplified illustrative wavelength-division-multiplexed (WDM) network for providing switched services and broadcast analog video distribution in accordance with the present invention,

FIG. 3 shows an illustrative optical network unit (ONU) for use in the network of FIG. 2,

FIG. 4 shows an illustrative WDM router for use in the network of FIG. 2,

FIG. 5 shows an alternative WDM router for use in the network of FIG. 2,

FIG. 6 shows another illustrative WDM network in accordance with the present invention, and

FIG. 7 shows yet another illustrative WDM network, in accordance with the present invention, which uses subcarrier modulation to carry the broadcast signal.

DETAILED DESCRIPTION

In the following description, each item or block of each figure has a reference designation associated therewith, the first number of which refers to the figure in which that item is first located (e.g., 105 is located in FIG. 1).

With reference to FIG. 1, there is shown a simplified illustrative switched services and broadcast analog video distribution system in accordance with our interpretation of the previously-referenced Jones article. Switched signals are transmitted to and received from a central location 101, e.g., a Central Office (CO), for distribution over separate fibers 102 to a plurality of Remote Nodes (RN) 103. As shown, one or more of the RNs may further distribute the signals to other locations. The broadcast television signals, typically a CATV signal is received at a Distribution Network (DN) 104 for broadcast, along with electrical power, over a coaxial cable network 105 to the RNs 103. Power and signal taps 106 located along the coaxial cable network 105 drop the broadcast TV signal and power to the RNs 103.

With reference to FIG. 2, there is shown a simplified illustrative wavelength-division-multiplexed (WDM) network 200, in accordance with the present invention, for providing switched services signals and for broadcasting the analog CATV video signal to a plurality of Optical Network Units (ONUs). The WDM network 200 may be implemented using any of a variety of well-known arrangements. One illustrative PON that may be used is the "RITE-net" described in the article entitled "A Wavelength-Division Multiplexed Passive Optical Network with Cost Shared Components," published in Photonics Technology Letters, pp. 1365-1367, November, 1994, by N. J. Frigo et. al..

At Central Office (CO) location 201, both the electrical broadcast CATV signal 202 (in either analog format or digital baseband or passband format) and switched signals 203 are used to modulate different optical carriers, each carrier having a different wavelength, to form a wavelength-division-multiplexed (WDM) signal in modulator/combiner 204. The resulting modulated WDM signal including the switched signal modulated optical carriers at wavelengths λ1, λ2, . . . λN, and the broadcast CATV modulated signal at wavelength λB are sent over path 205 and through a splitter 206 to remote Optical Network Units ONU1-ONUN. The splitter 206 may be a wavelength-division demultiplexer, such as the "Dragone" router, as described in U.S. Pat. No. 5,136,671, entitled "Optical Switch Multiplexer and Demultiplexer," issued on Aug. 4, 1992, and incorporated by reference herein. Unless otherwise stated, in the remainder of this description the splitter 206 will be assumed to be a WDM router.

As shown WDM router 206 places both the switched signal at wavelength λ1 and the broadcast CATV signal at wavelength λB onto the optical facility 207, e.g., optical fiber and associated circuits, to ONU1 while each of the remaining switched signals at wavelengths λ2, . . . λN are sent over a different optical facility to their respective remote ONU2-ONUN.

Splitter 206 directs each optical carrier to a single ONU based on the wavelength of the optical carrier. λ1 and λB are chosen such that both are transmitted to ONU1. If splitter 206 is a Dragone router, then this can be done easily, without altering the design of splitter 206 from the design used to implement RITE-Net without this invention. This is because the Dragone Router has a cyclic response, such that each output port of the router transmits a different set of wavelengths: λi +k.increment.λ where k is an integer, and λi is different for each output port (.increment.λ depends on the design of the Dragone router used). Therefore, if λB1 +.increment.λ, then both the broadcast signal, and the switched signal at wavelength λ1 will be transmitted to ONU1.

Each of the ONUs operate in a well known manner to convert the switched-signal optical carrier received from splitter 206 into electrical signals and modulate optical carriers with received electrical switched signals for transmission to CO 201. The ONU1 additionally splits the received switched signal transmitted at wavelength λ1 and the broadcast signal transmitted at wavelength λB into separate signals. The ONU1 converts the switched signal on the optical carrier received from splitter 206 into an electrical signal for the User and also uses the received electrical switched signals from the User to modulate an optical carrier for transmission to CO 201. The ONU1 additionally converts the received broadcast signal into an electrical signal suitable for transmission over the facility 210 which interconnects all of the ONUs. In accordance with the present invention, the broadcast signal may be analog or digital and the distribution facility 210 may be the existing cable TV distribution facilities (e.g., coaxial cable) that already connect to users (typical locations of the ONUs). In other implementations the distribution facilities may be coaxial cable, twisted pair, optical fiber, or wireless. When the distribution facility 210 is twisted pair or coaxial cable, ONU1 can also provide for power distribution to the other ONUs. The arrangement of FIG. 2 thus solves the problem of providing cost effective delivery of both switched services and an analog-video broadcast over a PON.

According to one aspect of the present invention, the WDM network of FIG. 2 provides route diversity, in the event of a failure in one or all of the primary signal paths to the ONUs. In such a circumstance, the broadcast-signal's path, or another primary switched-signal's optical carrier may be used with the distribution facility to provide a backup path for the transmission of a switched-services signal from the CO to one or more of the other ONUs, in the event of a failure in any of the optical facilities which connect to the one or more of the other ONUs.

FIG. 2 also shows a second WDM network (or PON network) 220 which distributes its own switched signal modulated wavelengths λ1, . . . λN over different optical fibers to their respective remote ONUs. As shown, the ONUs of PON network 220 may receive the broadcast analog video (and power) over the distribution facility 210 which has been extended to connect thereto. The distribution facility 210 also provides route diversity for network 220.

FIG. 3 shows an illustrative optical network unit ONU1 for use in the network of FIG. 2. As shown, a coarse WDM router 301 can be used in ONU1 to separate the switched signal modulated wavelength λ1 and the broadcast CATV modulated wavelength λB from the received signals λ1, λB. The switched signal at wavelength λ1 goes to optical transceiver 302. It is used for bidirectional communications between the users associated with ONU1 and the CO 101. The broadcast signals at wavelength λB is received and converted, if necessary, to a signal format compatible for transmission over distribution facility 210 in distribution module 303.

Shown in FIG. 4, is another embodiment of the present invention based on network 200. As shown, the illustrative optical splitter/conbimer 401 includes a WDM router 402 and a combiner 403. The illustrative optical splitter/combiner 401 receives the switched signal modulated optical wavelengths λ1, λ2, . . . λN, and the broadcast CATV modulated signal λB. The WDM router 402 separates the received switched signals at wavelengths λ1, λ2, . . . λN into separate optical wavelength signals. The combiner 403 combines the optical wavelength λ1 out of WDM router 401 with the broadcast CATV modulated signal λB to form the combined optical signal λ1, λB for ONU1. In one illustrative arrangement, described later in FIG. 6, the wavelengths λ1, λ2, . . . λN may be closely spaced around a wavelength of 1.5 microns, while the broadcast CATV modulated signal λB, illustratively, occurring at a wavelength of 1.3 microns. In another illustrative arrangement, also described in FIG. 6, wavelengths λ1, λ2, . . . λN are replaced with a single optical carrier at wavelength λ1, and the splitter 402 is a power splitter. The broadcast CATV modulated signal λB, is combined with the optical carrier carrying signals to ONU1 at combiner 403.

FIG. 5 shows an alternative WDM router to ONUs connection arrangement 501. As shown the WDM router 502 splits the combined optical signal λ1, λ2, . . . λN, and λB into separate wavelengths, each wavelength being sent to an ONU over a separate optical fiber. In such an arrangement, 501 connects to ONU1 using two fibers, a separate fiber for each of the two different wavelengths λ1 and λB. Such an arrangement eliminates the need for a wavelength demultiplexer at ONU1.

FIG. 6 shows another illustrative WDM network in accordance with the present invention. As shown, each of the switched signals could be modulated onto different wavelengths λ1, λ2, . . . λN, all near 1.5 micron. Alternatively they could be transmitted using one optical carrier with wavelength λ1. The broadcast signal, illustratively, is transmitted using a 1.3 micron wavelength optical carrier. These signals are then multiplexed together in a combiner 601 (or multiplexer). The splitter/combiner circuit 602 includes a "coarse" 1.3/1.5 micron demultiplexer (or router) 603 to produce separate 1.3 and 1.5 micron wavelength optical signals. When multple optical carriers are used to transmit the switched signals then splitter 604 is either a "fine" demultiplexer or router which separates the closely spaced wavelengths λ1, λ2, . . . λN. When a single optical carrier is used to transmit the switched signals then splitter 604 is a power splitter. A combiner 605 combines the approximately 1.5 micron wavelength signal λ1, with the broadcast signal λB at 1.3 microns. The resulting optical signal is then sent to ONU1 610. At ONU1 a demultiplexer 611 separates the 1.5 micron switched signal from the 1.3 micron broadcast signal. As previously described, the optical broadcast signal is demodulated and converted by distribution module (DM) 612 into the type of signal needed for distribution over facility 620 to the other ONUs. The 1.5 micron switched signal is received and demodulated at receiver 613 and outputted to the users.

FIG. 7 shows yet another illustrative WDM network, in accordance with the present invention, which uses Radio Frequency (RF) subcarrier(s) in the frequency band 701 to carry the broadcast signal over the same wavelength λ1 used to carry the switched signals. If necessary, the broadcast signal is frequency converted from its original band into frequency band 701 to insure frequency separation from the switched signals 702. The switched and broadcast signals are combined and modulate the optical carrier at wavelength λ1 in modulator 703. The other switched signals are used to modulate the optical carriers at wavelengths λ2, . . . λN. These optical carriers are summed in combiner 703a with the optical carrier at wavelength λ1 from modulator 703. The resulting signal is then sent to WDM router 704 which separates the wavelengths for transmission over different fibers to the respective ONUS, as previously described. At ONU1 705, the signal at λ1 is converted into an electrical signal and using standard RF techniques, separated into the switched signal and the broadcast signal. As previously described, the broadcast signal is converted into the type of electrical signal needed for transmission over broadcast distribution facility 706 to the other ONUs. The demodulated switched signal is outputted to the users associated with ONU1.

What has been described is merely illustrative of the application of the principles of the present invention. Other arrangements and methods can be implemented by those skilled in the art without departing from the spirit and scope of the present invention.

Claims (17)

We claim:
1. A Wavelength-Division-Multiplexed (WDM) optical network comprising
a first optical apparatus, including an optical splitter, for communicating each of a first set of optical switched services signals over a separate optical facility to each of a plurality of Optical Network Units (ONUs) and for communicating an optical broadcast signal to a selected one of the plurality of ONUs and
said selected ONU connected to a distribution facility which interconnects to one or more of the plurality of ONUs, said selected ONU including means for communicating the optical broadcast signal over the distribution facility to the other one or more of the ONUs.
2. The WDM network of claim 1 wherein the optical splitter includes
a splitter which sends signals over the separate optical facility to the ONUs and
a combiner which combines the first optical signal being transmitted to the selected ONU with the optical broadcast signal.
3. The WDM network of claim 2 wherein the combiner is a wavelength-division multiplexer and wherein the first optical signal is transmitted to the selected ONU is transmitted using a different wavelength than the wavelength used to transmit the optical broadcast signal.
4. The WDM network of claim 1 wherein the selected ONU includes a splitter for separating the received broadcast and switched services.
5. The WDM network of claim 1 wherein the optical broadcast signal is transmitted to the selected ONU by modulating a Radio Frequency (RF) sub-carrier on a wavelength used for transporting the optical switched services signal to the selected ONU.
6. The WDM network of claim 1 wherein the selected second optical apparatus sends power over the distribution facility to one or more of the other second optical apparatuses.
7. The WDM network of claim 1 wherein the path for carrying broadcast signals is used to provide a backup path for the transmission of switched services signal over the distribution facility to one or more of the other second optical apparatuses, in the event of a failure in any of the optical facilities which connect to the one or more of the other second optical apparatuses.
8. The WDM network of claim 1 wherein a separate optical facility to the selected second optical apparatus is used to provide a backup path for the transmission switched services signal over the distribution facility to one or more of the other second optical apparatuses, in the event of a failure in any of the optical facilities which connect to the one or more of the other ONUs.
9. The WDM network of claim 1 wherein each of the first set of signals and the optical broadcast signal use different wavelengths.
10. The WDM network of claim 9 wherein the first optical apparatus includes
a coarse splitter for separating the different optical wavelength used for the switched services signals from the wavelength used for the optical broadcast signal,
a second splitter for dividing the switched services signals wavelengths for communication to each of the plurality of second optical apparatuses, and
a multiplexer for combining the optical broadcast signal from the coarse splitter with an optical wavelength switched services signal from the second splitter for communication to the selected second optical apparatus.
11. The WDM network of claim 10 wherein the second splitter is a power splitter which divides the optical power of the first set of signals communicated to each of the plurality of second optical apparatuses.
12. The WDM network of claim 10 wherein the second splitter is a fine wavelength-division demultiplexer for separating different optical wavelength switched services signals for communication to each of the plurality of second optical apparatuses.
13. The WDM network of claim 1 wherein the first set of signals use a first wavelength and the optical broadcast signal uses a different second wavelength.
14. A Wavelength-Division-Multiplexed (WDM) network comprising
a first optical apparatus, including a Dragone router, for communicating each of a first set of optical signals, transmitted using different optical wavelengths, over a separate optical facility to each of a plurality of second optical apparatuses and for communicating an optical broadcast signal to a selected one of the plurality of second optical apparatuses and
said selected second optical apparatus connected to a distribution facility which interconnects to one or more of the plurality of second optical apparatuses, said selected second optical apparatus including means for communicating the optical broadcast signal over the distribution facility to the other one or more of the second optical apparatuses.
15. A method of operating a Wavelength-Division-Multiplexed (WDM) network comprising the steps of:
communicating, from a first optical apparatus including an optical splitter, each of a set of optical switched services signals over a separate optical facility to each of a plurality of Optical Network Units (ONUs) and communicating an optical broadcast signal to a selected one of the plurality of ONUs and
receiving, at a selected ONU of the plurality of ONUs, the broadcast signal and communicating the optical broadcast signal over a separate distribution facility which interconnects the selected ONU to the other one or more of the ONUs.
16. A first optical apparatus for use in a Wavelength-Division Multiplexed (WDM) network comprising
first means, including an optical splitter, for communicating at one optical wavelength, switched services signals over a separate optical facility to each of a plurality of Optical Network Units (ONUs) of the WDM network and
second means, including an optical combiner, for communicating a different optical wavelength signal to a selected one of the plurality of ONUs for distribution over a distribution facility to one or more of the ONUs.
17. A first optical apparatus for use in a Wavelength-Division Multiplexed (WDM) network comprising
first means, including an optical splitter, for communicating switched services signals over a separate optical facility to each of a plurality of Optical Network Units (ONUs) of the WDM network, using a different wavelength for each ONU and
second means, including an optical combiner, for communicating a different optical wavelength signal to a selected one of the plurality of ONUs for distribution over a distribution facility to one or more of the ONUs.
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Cited By (53)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6144472A (en) * 1998-01-20 2000-11-07 Lucent Technologies Inc. Upgrading a power-splitting passive optical network using optical filtering
WO2000069104A2 (en) * 1999-05-11 2000-11-16 Marconi Communications, Inc. Rf return optical transmission
US6151144A (en) * 1998-01-20 2000-11-21 Lucent Technologies, Inc. Wavelength division multiplexing for unbundling downstream fiber-to-the-home
US20010004290A1 (en) * 1999-12-21 2001-06-21 Lee Chang Hee Low-cost WDM source with an incoherent light injected fabry-perot laser diode
US6288806B1 (en) * 1997-10-08 2001-09-11 Fujitsu Limited Optical subscriber network system and fault supervising method for optical subscriber network system
US20020033977A1 (en) * 2000-08-03 2002-03-21 Martin Birk System for flexible multiple broadcast service delivery over a WDM passive optical network based on RF block-conversion of RF service bands within wavelength bands
US6427035B1 (en) 1999-08-12 2002-07-30 Bellsouth Intellectual Property Corporation Method and apparatus for deploying fiber optic cable to subscriber
US20020110315A1 (en) * 2001-02-15 2002-08-15 Alcatel Usa Sourcing, L.P. Pre-splitter module for conditioning optical signals in an access network
US20020122230A1 (en) * 2001-03-05 2002-09-05 Hossein Izadpanah Hybrid RF and optical wireless communication link and network structure incorporating it therein
US20020154363A1 (en) * 2001-04-24 2002-10-24 Alcatel Universal fiber optics network
US6490065B2 (en) * 1997-01-21 2002-12-03 Alcatel Optical transmission system
US20030005467A1 (en) * 2001-06-29 2003-01-02 Koninklijke Philips Electronics N.V. Uncooled laser generation of narrowcast CATV signal
US6577422B1 (en) * 1998-02-18 2003-06-10 At&T Corp. Long reach delivery of broadcast services using broadband optical sources and pre-compensation dispersion
WO2003049346A1 (en) * 2001-12-04 2003-06-12 Optinel Systems, Inc. Efficient multi-format optical transport of broadband signals for dwdm cable tv networks
US20030128983A1 (en) * 1999-05-11 2003-07-10 Buabbud George H. Digital RF return over fiber
US20030206740A1 (en) * 2002-05-03 2003-11-06 Lee Chang Hee Wavelength-tunable light source and wavelength-division multiplexed transmission system using the source
US6654563B1 (en) 1999-02-17 2003-11-25 At&T Corp. Fiber/wired communication system
US20030235415A1 (en) * 2002-06-21 2003-12-25 Peters Frank H. Optical communication devices and optical communication methods
US20040037566A1 (en) * 2000-01-13 2004-02-26 Lightpointe Communications, Inc. Hybrid wireless optical and radio frequency communication link
US6751417B1 (en) * 1999-02-17 2004-06-15 At&T Corp. Fiber and wire communication system
US6763193B1 (en) * 1998-12-16 2004-07-13 Lucent Technologies Inc. Optical communication system optically combining both baseband and passband signals
US6778318B2 (en) 2001-06-29 2004-08-17 Hrl Laboratories, Llc Optical-to-wireless WDM converter
US20050024499A1 (en) * 2000-07-05 2005-02-03 Luciano Joseph W. Photoprinter control of peripheral devices
US20050025484A1 (en) * 2003-07-28 2005-02-03 Dae-Kwang Jung Wavelength-division-multiplexed passive optical network using multi-wavelength lasing source and reflective optical amplification means
US20050094660A1 (en) * 2003-10-29 2005-05-05 Lee Sang W. Optical network unit and method for servicing ethernet-based digital broadcasting
US6895185B1 (en) * 2000-08-24 2005-05-17 Korea Advanced Institute Of Science And Technology Multi-purpose optical fiber access network
US20050135449A1 (en) * 2003-12-19 2005-06-23 Sorin Wayne V. Integration of laser sources and detectors for a passive optical network
US20050147410A1 (en) * 2003-12-26 2005-07-07 Alcatel Method and system configured for providing passive optical network fiber protection
US20050175344A1 (en) * 2004-02-06 2005-08-11 Utstarcom, Inc. System and apparatus for a carrier class WDM PON accommodating multiple services or protocols
US20050175343A1 (en) * 2004-02-03 2005-08-11 Utstarcom, Inc. System and apparatus for a carrier class WDM PON for increased split number and bandwidth
US20050286903A1 (en) * 2004-06-28 2005-12-29 Jennen Jean G Protocol and line-rate transparent WDM passive optical network
US20060045542A1 (en) * 2002-09-19 2006-03-02 Chang-Hee Lee Apparatuses and methods for automatic wavelength locking of an optical transmitter to the wavelength of an injected incoherent light signal
US20060083513A1 (en) * 2004-10-14 2006-04-20 Huang William X System and apparatus for a carrier class WDM PON providing trunk protection with increased fiber utilization, distance and bandwidth
US7068937B1 (en) 1999-02-17 2006-06-27 At&T Corp. Fiber and wire communication system
US20060153566A1 (en) * 2005-01-13 2006-07-13 Sorin Wayne V Methods and apparatuses to provide a wavelength-division-multiplexing passive optical network with asymmetric data rates
US7079768B2 (en) 2000-10-03 2006-07-18 Lucent Technologies Inc. Dynamic passive optical network (PON) using a distributed optical cross connect and dense wavelength division multiplexing
US7103907B1 (en) 1999-05-11 2006-09-05 Tellabs Bedford, Inc. RF return optical transmission
US20070036554A1 (en) * 2005-08-09 2007-02-15 Weaver Thomas L Thermal drift compensation system and method for optical networks
US20070165688A1 (en) * 2003-05-29 2007-07-19 Chang-Hee Lee Light source cable of lasing that is wavelength locked by an injected light signal
US7283749B1 (en) 1999-02-17 2007-10-16 At&T Corp. Fiber and wire communication system
US20070274729A1 (en) * 2003-05-30 2007-11-29 Novera Optics Inc. Shared High-Intensity Broadband Light Source for a Wavelength-Division Multiple Access Passive Optical Network
US20070297801A1 (en) * 2006-06-02 2007-12-27 Mostert Willem A DWDM transport of CATV and digital signals over optical fiber in low-dispersion spectral regions
US20080089692A1 (en) * 2006-10-11 2008-04-17 Novera Optics, Inc. Mutual wavelength locking in WDM-PONs
US7409159B2 (en) 2001-06-29 2008-08-05 Hrl Laboratories, Llc Wireless wavelength division multiplexed system
US20080215221A1 (en) * 2005-06-22 2008-09-04 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Clutch reference position
US20090080880A1 (en) * 2005-09-07 2009-03-26 Chang-Hee Lee Apparatus for Monitoring Failure Positions in Wavelength Division Multiplexing-Passive Optical Networks and Wavelength Division Multiplexing-Passive Optical Network Systems Having the Apparatus
US20100226654A1 (en) * 2009-03-05 2010-09-09 Adc Telecommunications, Inc. Methods, Systems and Devices for Integrating Wireless Technology into a Fiber Optic Network
US20100239253A1 (en) * 2009-03-20 2010-09-23 Industrial Technology Research Institute Passive Optical Network System Supporting Wireless Communication
US7912372B2 (en) 2002-12-24 2011-03-22 Korea Advanced Institute Of Science And Technology Optical access network using wavelength-locked WDM optical source injected by incoherent light
US20120251108A1 (en) * 2009-10-26 2012-10-04 Telefonaktiebolaget L M Ericsson (Publ) Optical Communications Networks, Optical Line Terminations and Related Methods
US8290370B2 (en) 2005-09-20 2012-10-16 Korea Advanced Institute Of Science And Technology Wavelength division multiplexing passive optical network for providing both of broadcasting service and communication service and central office used thereof
US8837940B2 (en) 2010-04-14 2014-09-16 Adc Telecommunications, Inc. Methods and systems for distributing fiber optic telecommunication services to local areas and for supporting distributed antenna systems
US9078287B2 (en) 2010-04-14 2015-07-07 Adc Telecommunications, Inc. Fiber to the antenna

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5202780A (en) * 1989-04-22 1993-04-13 Alcatel N.V. Optical communication system for the subscriber area
US5694234A (en) * 1994-10-20 1997-12-02 Lucent Technologies Inc. Wavelength division multiplexing passive optical network including broadcast overlay

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5202780A (en) * 1989-04-22 1993-04-13 Alcatel N.V. Optical communication system for the subscriber area
US5694234A (en) * 1994-10-20 1997-12-02 Lucent Technologies Inc. Wavelength division multiplexing passive optical network including broadcast overlay

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Video Services Delivery in Fiber in the Loop Systems Using MPEG Encoding and ATM Transport by J. R. Jones, published in IEEE Lasers and Electro Optics Society 1993 Annual Meeting, Nov. 15 18, 1993. *
Video Services Delivery in Fiber in the Loop Systems Using MPEG Encoding and ATM Transport by J. R. Jones, published in IEEE Lasers and Electro-Optics Society 1993 Annual Meeting, Nov. 15-18, 1993.

Cited By (111)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6490065B2 (en) * 1997-01-21 2002-12-03 Alcatel Optical transmission system
US6288806B1 (en) * 1997-10-08 2001-09-11 Fujitsu Limited Optical subscriber network system and fault supervising method for optical subscriber network system
US6151144A (en) * 1998-01-20 2000-11-21 Lucent Technologies, Inc. Wavelength division multiplexing for unbundling downstream fiber-to-the-home
US6144472A (en) * 1998-01-20 2000-11-07 Lucent Technologies Inc. Upgrading a power-splitting passive optical network using optical filtering
US6577422B1 (en) * 1998-02-18 2003-06-10 At&T Corp. Long reach delivery of broadcast services using broadband optical sources and pre-compensation dispersion
US6763193B1 (en) * 1998-12-16 2004-07-13 Lucent Technologies Inc. Optical communication system optically combining both baseband and passband signals
US7068937B1 (en) 1999-02-17 2006-06-27 At&T Corp. Fiber and wire communication system
US7450850B2 (en) 1999-02-17 2008-11-11 At&T Corp. Fiber and wire communication system
US7190903B1 (en) 1999-02-17 2007-03-13 At&T Corp. Fiber and wire communication system
US20090067841A1 (en) * 1999-02-17 2009-03-12 Combs Charles D Fiber and wire communication system
US7783196B2 (en) 1999-02-17 2010-08-24 At&T Intellectual Property Ii, L.P. Fiber and wire communication system
US7831147B2 (en) 1999-02-17 2010-11-09 At&T Intellectual Property Ii, L.P. Fiber and wire communication system
US7734179B1 (en) 1999-02-17 2010-06-08 At&T Corp. Fiber/wired communication system
US20070166036A1 (en) * 1999-02-17 2007-07-19 Combs Charles D Fiber and wire communication system
US7283749B1 (en) 1999-02-17 2007-10-16 At&T Corp. Fiber and wire communication system
US6751417B1 (en) * 1999-02-17 2004-06-15 At&T Corp. Fiber and wire communication system
US6654563B1 (en) 1999-02-17 2003-11-25 At&T Corp. Fiber/wired communication system
US20080019695A1 (en) * 1999-02-17 2008-01-24 Combs Charles D Fiber and wire communication system
US20020015203A1 (en) * 1999-05-11 2002-02-07 Buabbud George H. Optical communication system for transmitting RF signals downstream and bidirectional telephony signals which also include RF control signals upstream
US7058966B2 (en) 1999-05-11 2006-06-06 Tellabs Bedford, Inc. Optical communication system for transmitting RF signals downstream and bidirectional telephony signals which also include RF control signals upstream
WO2000069104A2 (en) * 1999-05-11 2000-11-16 Marconi Communications, Inc. Rf return optical transmission
WO2000069104A3 (en) * 1999-05-11 2001-02-08 Marconi Comm Inc Rf return optical transmission
US7103907B1 (en) 1999-05-11 2006-09-05 Tellabs Bedford, Inc. RF return optical transmission
US20030128983A1 (en) * 1999-05-11 2003-07-10 Buabbud George H. Digital RF return over fiber
US20020124261A1 (en) * 1999-05-11 2002-09-05 Buabbud George H. RF return optical transmission
US20060242682A1 (en) * 1999-05-11 2006-10-26 Tellabs Bedford, Inc. An Optical Communication System for Transmitting RF Signals Downstream and Bidirectional Telephony Signals Which Also Include RF Control Signals Upstream
US20070083909A1 (en) * 1999-05-11 2007-04-12 Tellabs Bedford, Inc. RF Return Optical Transmission
US6460182B1 (en) 1999-05-11 2002-10-01 Marconi Communications, Inc. Optical communication system for transmitting RF signals downstream and bidirectional telephony signals which also include RF control signals upstream
US6427035B1 (en) 1999-08-12 2002-07-30 Bellsouth Intellectual Property Corporation Method and apparatus for deploying fiber optic cable to subscriber
US7106974B2 (en) 1999-12-21 2006-09-12 Korea Advanced Institute Of Science & Technology Low-cost WDM source with an incoherent light injected fabry-perot laser diode
US20010004290A1 (en) * 1999-12-21 2001-06-21 Lee Chang Hee Low-cost WDM source with an incoherent light injected fabry-perot laser diode
US8798478B2 (en) 1999-12-21 2014-08-05 Korea Advanced Institute Of Science And Technology Low-cost WDM source with an incoherent light injected fabry-perot laser diode
US20110211838A1 (en) * 1999-12-21 2011-09-01 Chang Hee Lee Low-cost wdm source with an incoherent light injected fabry-perot laser diode
US8326151B2 (en) 1999-12-21 2012-12-04 Korea Advanced Institute Of Science And Technology Low-cost WDM source with an incoherent light injected Fabry-Perot laser diode
US20110211839A1 (en) * 1999-12-21 2011-09-01 Chang Hee Lee Low-cost wdm source with an incoherent light injected fabry-perot laser diode
US7903979B2 (en) 1999-12-21 2011-03-08 Korea Advanced Institute Of Science And Technology Low-cost WDM source with an incoherent light injected Fabry-Perot laser diode
US20060263090A1 (en) * 1999-12-21 2006-11-23 Korea Advanced Institute Of Science And Technology Low-cost WDM source with an incoherent light injected Fabry-Perot laser diode
US7110678B2 (en) 2000-01-13 2006-09-19 Lightpointe Communications, Inc. Hybrid wireless optical and radio frequency communication link
US20040037566A1 (en) * 2000-01-13 2004-02-26 Lightpointe Communications, Inc. Hybrid wireless optical and radio frequency communication link
US20040208591A1 (en) * 2000-01-13 2004-10-21 Lightpointe Communications, Inc. Hybrid wireless optical and radio frequency communication link
US20050024499A1 (en) * 2000-07-05 2005-02-03 Luciano Joseph W. Photoprinter control of peripheral devices
US20020033977A1 (en) * 2000-08-03 2002-03-21 Martin Birk System for flexible multiple broadcast service delivery over a WDM passive optical network based on RF block-conversion of RF service bands within wavelength bands
US7286761B2 (en) * 2000-08-03 2007-10-23 At&T Corp. Method of flexible multiple broadcast service delivery over a WDM passive optical network based on RF Block-conversion of RF service bands within wavelength bands
US7085495B2 (en) * 2000-08-03 2006-08-01 At&T Corp. System for flexible multiple broadcast service delivery over a WDM passive optical network based on RF block-conversion of RF service bands within wavelength bands
US6895185B1 (en) * 2000-08-24 2005-05-17 Korea Advanced Institute Of Science And Technology Multi-purpose optical fiber access network
US7079768B2 (en) 2000-10-03 2006-07-18 Lucent Technologies Inc. Dynamic passive optical network (PON) using a distributed optical cross connect and dense wavelength division multiplexing
US20020110315A1 (en) * 2001-02-15 2002-08-15 Alcatel Usa Sourcing, L.P. Pre-splitter module for conditioning optical signals in an access network
US20020122230A1 (en) * 2001-03-05 2002-09-05 Hossein Izadpanah Hybrid RF and optical wireless communication link and network structure incorporating it therein
US20020154363A1 (en) * 2001-04-24 2002-10-24 Alcatel Universal fiber optics network
US7409159B2 (en) 2001-06-29 2008-08-05 Hrl Laboratories, Llc Wireless wavelength division multiplexed system
US20040234273A1 (en) * 2001-06-29 2004-11-25 Hrl Laboratories, Llc Optical-to-wireless WDM converter
US7174064B2 (en) 2001-06-29 2007-02-06 Hrl Laboratories, Llc Optical channelizer utilizing resonant microsphere coupling
US7433598B2 (en) * 2001-06-29 2008-10-07 Broadband Royalty Corp. Uncooled laser generation of narrowcast CATV signal
US7292791B2 (en) 2001-06-29 2007-11-06 Hrl Laboratories, Llc Optical-to-wireless wdm converter
US6778318B2 (en) 2001-06-29 2004-08-17 Hrl Laboratories, Llc Optical-to-wireless WDM converter
US20030005467A1 (en) * 2001-06-29 2003-01-02 Koninklijke Philips Electronics N.V. Uncooled laser generation of narrowcast CATV signal
US20040228638A1 (en) * 2001-06-29 2004-11-18 Hrl Laboratories, Llc Optical-to-wireless WDM converter
WO2003049346A1 (en) * 2001-12-04 2003-06-12 Optinel Systems, Inc. Efficient multi-format optical transport of broadband signals for dwdm cable tv networks
US20030152386A1 (en) * 2001-12-04 2003-08-14 Vohra Sandeep T. Efficient multi-format optical transport of broadband signals for DWDM cable TV networks
US20030206740A1 (en) * 2002-05-03 2003-11-06 Lee Chang Hee Wavelength-tunable light source and wavelength-division multiplexed transmission system using the source
US7613398B2 (en) 2002-05-03 2009-11-03 Korea Advanced Institute Of Science And Technology Wavelength-tunable light source and wavelength-division multiplexed transmission system using the source
US7349631B2 (en) 2002-05-03 2008-03-25 Korea Advanced Institute Of Science And Technology Wavelength-tunable light source and wavelength-division multiplexed transmission system using the source
US7327957B2 (en) 2002-05-03 2008-02-05 Korea Advanced Institute Of Science And Technology Wavelength-tunable light source and wavelength-division multiplexed transmission system using the source
US20070081823A1 (en) * 2002-05-03 2007-04-12 Korea Advanced Institute Of Science And Technology Wavelength-tunable light source and wavelength-division multiplexed transmission system using the source
US20030235415A1 (en) * 2002-06-21 2003-12-25 Peters Frank H. Optical communication devices and optical communication methods
US7593647B2 (en) 2002-09-19 2009-09-22 Novera Optics, Inc. Apparatuses and methods for automatic wavelength locking of an optical transmitter to the wavelength of an injected incoherent light signal
US20060045542A1 (en) * 2002-09-19 2006-03-02 Chang-Hee Lee Apparatuses and methods for automatic wavelength locking of an optical transmitter to the wavelength of an injected incoherent light signal
US7912372B2 (en) 2002-12-24 2011-03-22 Korea Advanced Institute Of Science And Technology Optical access network using wavelength-locked WDM optical source injected by incoherent light
US7515626B2 (en) 2003-05-29 2009-04-07 Novera Optics, Inc. Light source capable of lasing that is wavelength locked by an injected light signal
US20070165688A1 (en) * 2003-05-29 2007-07-19 Chang-Hee Lee Light source cable of lasing that is wavelength locked by an injected light signal
US20070274729A1 (en) * 2003-05-30 2007-11-29 Novera Optics Inc. Shared High-Intensity Broadband Light Source for a Wavelength-Division Multiple Access Passive Optical Network
US8861963B2 (en) 2003-05-30 2014-10-14 Novera Optics, Inc. Shared high-intensity broadband light source for a wavelength-division multiple access passive optical network
US20050025484A1 (en) * 2003-07-28 2005-02-03 Dae-Kwang Jung Wavelength-division-multiplexed passive optical network using multi-wavelength lasing source and reflective optical amplification means
US20050094660A1 (en) * 2003-10-29 2005-05-05 Lee Sang W. Optical network unit and method for servicing ethernet-based digital broadcasting
US20050135449A1 (en) * 2003-12-19 2005-06-23 Sorin Wayne V. Integration of laser sources and detectors for a passive optical network
US7944960B2 (en) 2003-12-19 2011-05-17 Novera Optics, Inc. Integration of laser sources and detectors for a passive optical network
US20080137698A1 (en) * 2003-12-19 2008-06-12 Sorin Wayne V Integration of laser sources and detectors for a passive optical network
US7916767B2 (en) 2003-12-19 2011-03-29 Novera Optics, Inc. Integration of laser sources and detectors for a passive optical network
US7593444B2 (en) 2003-12-19 2009-09-22 Novera Optics, Inc. Integration of laser sources and detectors for a passive optical network
US7313157B2 (en) 2003-12-19 2007-12-25 Novera Optics, Inc. Integration of laser sources and detectors for a passive optical network
US20100014865A1 (en) * 2003-12-19 2010-01-21 Sorin Wayne V Integration of laser sources and detectors for a passive optical network
US20050147410A1 (en) * 2003-12-26 2005-07-07 Alcatel Method and system configured for providing passive optical network fiber protection
US20050175343A1 (en) * 2004-02-03 2005-08-11 Utstarcom, Inc. System and apparatus for a carrier class WDM PON for increased split number and bandwidth
US20050175344A1 (en) * 2004-02-06 2005-08-11 Utstarcom, Inc. System and apparatus for a carrier class WDM PON accommodating multiple services or protocols
US20050286903A1 (en) * 2004-06-28 2005-12-29 Jennen Jean G Protocol and line-rate transparent WDM passive optical network
US7386235B2 (en) 2004-06-28 2008-06-10 Lucent Technologies Inc. Protocol and line-rate transparent WDM passive optical network
US20060083513A1 (en) * 2004-10-14 2006-04-20 Huang William X System and apparatus for a carrier class WDM PON providing trunk protection with increased fiber utilization, distance and bandwidth
US20060153566A1 (en) * 2005-01-13 2006-07-13 Sorin Wayne V Methods and apparatuses to provide a wavelength-division-multiplexing passive optical network with asymmetric data rates
US20080215221A1 (en) * 2005-06-22 2008-09-04 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Clutch reference position
US20070036554A1 (en) * 2005-08-09 2007-02-15 Weaver Thomas L Thermal drift compensation system and method for optical networks
US9130671B2 (en) 2005-09-07 2015-09-08 Korea Advanced Institute Of Science And Technology Apparatus for monitoring failure positions in wavelength division multiplexing-passive optical networks and wavelength division multiplexing-passive optical network systems having the apparatus
US20090080880A1 (en) * 2005-09-07 2009-03-26 Chang-Hee Lee Apparatus for Monitoring Failure Positions in Wavelength Division Multiplexing-Passive Optical Networks and Wavelength Division Multiplexing-Passive Optical Network Systems Having the Apparatus
US8290370B2 (en) 2005-09-20 2012-10-16 Korea Advanced Institute Of Science And Technology Wavelength division multiplexing passive optical network for providing both of broadcasting service and communication service and central office used thereof
US8213797B2 (en) * 2006-06-02 2012-07-03 Aurora Networks, Inc. DWDM transport of CATV and digital signals over optical fiber in low-dispersion spectral regions
US20070297801A1 (en) * 2006-06-02 2007-12-27 Mostert Willem A DWDM transport of CATV and digital signals over optical fiber in low-dispersion spectral regions
US8571410B2 (en) 2006-10-11 2013-10-29 Novera Optics, Inc. Mutual wavelength locking in WDM-PONS
US20080089692A1 (en) * 2006-10-11 2008-04-17 Novera Optics, Inc. Mutual wavelength locking in WDM-PONs
US20100226654A1 (en) * 2009-03-05 2010-09-09 Adc Telecommunications, Inc. Methods, Systems and Devices for Integrating Wireless Technology into a Fiber Optic Network
US9438342B2 (en) 2009-03-05 2016-09-06 Commscope Technologies Llc Methods, systems, and devices for integrating wireless technology into a fiber optic network
US8532490B2 (en) * 2009-03-05 2013-09-10 Adc Telecommunications, Inc. Methods, systems and devices for integrating wireless technology into a fiber optic network
US9893813B2 (en) 2009-03-05 2018-02-13 Commscope Technologies Llc Methods, systems, and devices for integrating wireless technology into a fiber optic network
US8929740B2 (en) 2009-03-05 2015-01-06 Adc Telecommunications, Inc. Methods, systems and devices for integrating wireless technology into a fiber optic network
US8270833B2 (en) * 2009-03-20 2012-09-18 Industrial Technology Research Institute Passive optical network system supporting wireless communication
US20100239253A1 (en) * 2009-03-20 2010-09-23 Industrial Technology Research Institute Passive Optical Network System Supporting Wireless Communication
US9331811B2 (en) * 2009-10-26 2016-05-03 Telefonaktiebolaget L M Ericsson Optical communications networks, optical line terminations and related methods
US20120251108A1 (en) * 2009-10-26 2012-10-04 Telefonaktiebolaget L M Ericsson (Publ) Optical Communications Networks, Optical Line Terminations and Related Methods
US8837940B2 (en) 2010-04-14 2014-09-16 Adc Telecommunications, Inc. Methods and systems for distributing fiber optic telecommunication services to local areas and for supporting distributed antenna systems
US9414137B2 (en) 2010-04-14 2016-08-09 Commscope Technologies Llc Methods and systems for distributing fiber optic telecommunication services to local areas and for supporting distributed antenna systems
US9553669B2 (en) 2010-04-14 2017-01-24 Commscope Technologies Llc Fiber to the antenna
US9888524B2 (en) 2010-04-14 2018-02-06 Commscope Technologies Llc Fiber to the antenna
US9078287B2 (en) 2010-04-14 2015-07-07 Adc Telecommunications, Inc. Fiber to the antenna

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